A scout named Greel is exploring the upper reaches of The People and comes to an ancient subway tunnel, just as two explorers from the lunar colony arrive in an attempt to reestablish communication with any survivors.

I bet when he stood by his advance base on Newfoundland, Leif Eriksson would've been surprised to hear his base would fail and his dad's colony on Greenland would eventually die out, that the "new world" would have to be rediscovered in 500 years by explorers from a successor state on the territory of what he knew as the Caliphate of al-Andalus, or 500 years after that the entire world would be dominated by a breakaway colony set up by people from a wretched little country currently being ruled by a wanker named Ethelred.